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<html>]
    <head>
        <meta charset="UTF-8">
        <title>标题字应用</title>
    </head>
    <body>
        <h1 align = "center">Web前端开发技术</h1>
        <h2 align = "left">Web前端开发技术</h2>
        <h3 align = "center">Web前端开发技术</h3>
        <h4 align = "right">Web前端开发技术</h4>
        <h5 align = "justify">Web前端开发技术</h5>
        <h6 align = "center">Web前端开发技术</h6>
    </body>
</html>